Saw sharpening machine



Oct' 12 1954 H. K. ROBINSON ETAL 2,691,311

SAW SHARPENING MACHINE Filed DEC. 3, 1949 e sheets-sheet 1 lOct. 12, 1954 H. K. ROBINSON ETAL 2,691,311

SAW SHARPENING MACHINE Filed Dec. 3, 1949 6 Sheets-Sheet 2 Oct. 12, 1954 H. K. ROBINSON r-:T AL

sAw SHARPENING MACHINE 6 Sheets-Sheet 5 Filed DeC. 5, 1949 Fab/n son OC- 12, 1954 H. K. ROBINSON Erm. 2,691,311

SAW s-HARPENING MAcHiNE Filed Dec. 3. 1949 6 Sheets-Sheet 4 EQ2 ZZ In II//ZAcR A By n /JO 4 Oct. 12, 1954 H. K. ROBINSON ET AL SAW SHARPENING MACHINE Filed Dec. 3, 1949 6 Sheets-Sheet 5 y @www Azto rney Oct. 12, 1954 H. K. ROBINSON ET AL SAW SHARPENING MACHINE 6 Sheets-Sheet 6 Filed Dec. 5, 1949 volves, generally,

such as a le. operating inner and outer jaws, the inner jaw rbeing carried by the posts of the framewhile the volves that when said portion Patented Oct. l12, 1954 Holly K. Robinson and Harry '0. Berry, Calif.; said Berry assignor to said Inglewood, Robinson Application December 3, 1949, Serial No. 130,922

28 Claims.

Thisinvention has to do with a saw sharpening mac ne, it being a general object of the invention to provide a simple, effective, easily operated machine serving to sharpen the teeth of a saw such, for example, as an ordinary wood saw designed for manual operation.

The structure provided by this invention ina frame including a base, a standard projecting from the base, and a head on the standard having a cap portion, spaced legs depending from arms on the cap and having spaced lower end portions and posts extending up from the legs and converging to join at their upper ends. Thesaw clamping means is carried by the frame and operates to releasably hold a saw stationary when being' operated on by a tool The clamping means includes coouter jaw is carried by a clamp member located 'forward of and spaced from the frame parts. VThe clamp member haslower portions pivotally connected to frame.

the lowerends of the legs of. the Saw supporting means is carried by or from the'frame and includes a rail which is generally horizontal and extends transversely of the frame and-supports a carriage which carries saw grips. `Mounting means supports the rail andina support engaging under therail at the or central portion ithereof :and structure guiding the ends of the rail for lvertical movement. A raililexing means which is preferably adjustable engages the ends of the rail and operates to deflect the end portions ofthe rail downwardly from the normal straight horizontalposition. This means may be operated-sosthat the rail conforms in contour with al curved saw edge. The carriage operating on'the rail'is detachable middle therefrom and can be reversed/as to its position on the rail.

Operating means operatesthe carriage longitudinally of the rail and is a manually voperated means involving a hand wheel at the front of the machine,` a drum operated-by the hand wheel'A and an operating line wound on thek drum and having portions extending therefrom around guide rollers `and a portion between the rollers spaced from and parallel -Withthe rail. The last mentionedportion ofthe line is connectedwith-the carriage so of the line is operated the carriage operates therewith.

A tool mounting-supports a'tool such as a le r thelike so it acts oniteeth of a saw. Thetool mounting includes a neck carriediby theframe,

vpreferably for movement abonta :vertical axis involves a rotating crank justably supports a tool or file in position to act on the teeth of the saw in the desired manner. A means normally yieldingly holds the guide up so thetool is clear of the saw and a means normally yieldingly holds the guide in a central position so that it is in a vertical plane intersecting thevertical axis about whichthe neck moves. A stop means serves to set the neck against pivotal movement. An operating means is provided for the clamp member and is a cam means involving a rotating cam and a pivoted follower which operates a line that is adjustably coupled with the clamp member. An operating means is provided for operating the tool holder along the guide and arm, a rocker, a link between the arm and rocker and a link between the rocker and the tool holder. A drive is provided for the operating means actuating the clamp member and the operating means actuating the tool holder. The drive means preferably involves a prime mover, and an operating shaft driven from the prime mover and carrying both the cam and the crank.

A general object of this invention is to provide a mechanism of the general character hereinabove referred to which for operation requires certain manual manipulations while actions requiring the expenditure of an appreciable amount of energy are performed through mechanism operated by a prime mover.

vAnother object of this invention is to provide a mechanism of the general character referred to in which the tool that engages the teeth of the saw is so mounted and operated as to act on the teeth to sharpen them in the desired manner. A further object of this invention is to provide a machine of the general character referred to in which a clamp means is provided for releasably holding a saw that is supported on a shiftable carriage while power means is provided for reciprocating a cutting tool, the clamp means and power means being coordinated so that the saw is clamped tight and held secure while the cutting tool is acting to cut the saw.

It is another object of this invention to provide a structure of the general character referred to involving a compact simplied arrangement of parts making the machine practical for general tuse and inexpensive of manufacture.

tion will be fully understood from the following detailed description of a typical preferred form and application of the invention, throughout which description reference is made to the accompanying drawings, in which:

Fig. 1 is a front elevation of a machine embodying the present invention showing a saw in place therein and the machine ready for operation so that a tool such as a iile is operated in a direction transverse of the saw.

Fig. 2 is an end elevation of the structure shown in Fig. l, being a View taken substantially as indicated by line 2-2 on Fig. 1.

Fig. 3 is a plan view of the structure shown in Fig. 1 being a View taken as indicated by line 3-3 on Fig. 1.

Fig. 4 is an enlarged vertical sectional view of a portion of the machine taken as indicated by line ll-li on Fig. 1.

Fig. 5 is an enlarged detailed sectional view taken as indicated by line 5-5 on Fig. 1.

Fig. 6 is an enlarged detailed sectional View taken as indicated by line B- on Fig. l.

Fig. 7 is an enlarged detailed sectional view taken as indicated by line l-l on Fig. 3.

Fig. 8 is an enlarged detailed sectional view of a part of the mechanism provided for setting the neck of the machine against pivotal movement taken as indicated by line 8-8 on Fig. 7.

Fig. 9 is an enlarged plan view taken as indicated byline 9-9 on Fig. 2.

Fig. 10 is an enlarged sectional indicated by line iiil0 on Fig. 2.

Fig. ll is an enlarged sectional View taken as indicated by line l l-l i on Fig. 2.

Fig. 12 is an enlarged plan section taken as indicated by line iZ-i 2 on Fig. 2.

Fig. 13 is a transverse sectional View taken as indicated by line l3l 3 on Fig. 12.

Fig. 14 is a longitudinal sectional View taken as indicated by line lli-i i on Fig. 13.

Fig. 15 is a transverse sectional view taken as indicated by line iE-l 5 on Fig. 2.

Fig. 16 is an enlarged view taken substantially as indicated by line lE--l 5 on Fig. 4.

Fig. 17 is an enlarged View taken substantially as indicated by line ll-i l on Fig. 1.

Fig. 18 is an enlarged view of the central {Jortion of Fig. 1.

Fig. 19 is an enlarged view of parts shown in Fig. 2.

The machine embodying the present invention includes, generally, a frame A, saw clamping means B, saw supporting means C, operating means D for the saw supporting means C, a tool mounting E carrying a cutting tool such as a le F or the like, means G normally yieldingly holding the tool mounting in position where the le F is clear of the saw S, means H normally yieldingly holding the tool mounting in a middle or central position, so it is shiftable in either direction horizontally from such position, stop means J stopping or setting the tool mounting in a position so that the file works at 4a predetermined angle relative to the teeth of the saw, operating means K for the saw clamping means B, operating means L for the tool holding means E, and a power operated drive means M for the means K and L.

The frame A is a rigid stationary element or structure that carries and in some instances is cooperatively related to other parts of the machine. In the form of the invention illustrated the frame involves, generali f, a base H) engageable with a suitable support such as a floor, or

View taken as the like, a standard i i projecting upwardly from the base, and a head S2 on or carried by the standard. The head involves various elements or features and is preferably formed so that it has a cap I3 that engages and which is carried by the upper end of the standard Il, spaced arms i5 that extend horizontally and which are carried by the cap, spaced legs it which are carried by and which depend from the arms i5, posts IS that project upwardly from the arms and converge to support the inner jaw of the means B, and a bar il supported by the structure just named .and extending horizontally so that it projects in opposite directions at the two end portions of the machine.

The arms i5 are straight horizontally disposed parts o the frame attached to the cap and located forward of the cap so that they serve as eiective carriers or supports ior the legs and posts. The legs i4 extend downwardly a substantial distance from the arms i5 and as they descend from the arms they project somewhat forward or away from the standard Il so that their lower end portions are forward of the arms. The posts i8 project upwardly and converge from the uppermost arm I5 and they join at their upper end portions which are turned or shaped so that they project forward and act to support the inner jaw of the means B forward of the arms and well above the arms of the frame. The cross bar il of the frame is shown as a part formed separate from those above mentioned and joined thereto by suitable fasteners i9. The bar is of substantial length and extends horizontally from or beyond the legs, as clearly shown in Fig. 1 of the drawings.

The saw clamping means B operates to releasably hold the saw S stationary when the sharpening tool or le F is acting upon the saw to make a cut. The means B as shown in the drawings is characterized by cooperating inner and outer clamp jaws 20 and 2i and a clamp member 22 pivoted to the legs i4 and carrying the outer jaw. The inner jaw 20 of the means B is carried by and faces forward from the upper joined ends of the posts I6. The -jaw 2| is carried by the upper end of the clamp member 22 and opposes the jaw 20 as clearly shown in Fig. 2 of the drawings. The clamp member 22 is an elongate part corresponding in length with the combined leg and post construction of the frame above de scribed, and it has its lower end portion divided or bifurcated into spaced parts 23 which are pivotally connected to the lower ends of the legs i4 by a pivot member 24, the axis of the member 24 being horizontal and extending lengthwise of the machine. In the preferred form of the invention the lower end portion of the clamp member 22 or that portion of such member having the parts 23 extends downwardly and somewhat rearwardly while the upper end portion of the member 22 that carries the jaw 2l is curved or formed to project rearwardly. Through the construction above described it will be apparent that the frame parts M and I6 cooperate with the clamp member 22 to define a space X in the machine which will accommodate various other elements of the structure as shown throughout the drawings. In the preferred form of the invention portions of the structure just described may be made slightly flexible, for instance, the lower end portions of the legs i4 and the parts 23 of the clamp member 22 may be downwardly tapered so that they are of minimum size where they are pivotally connected, thus providing a construction which-willyiel'd somewhat unde'rthe clamping 'or actuating forces generated'by thevmeansvKiherein'after described.

. lThe `saw supporting means fC` involves, :generally, a rai1'25, a carriage`2'6'operatingfon the rail 25, mounting. means 21 supporting-the railiin or froml theframeA andrail flexing meansl28. The mounting means-25. preferably supports Ithe rail atits. center and guidesit: at the Iends.

The lrail `2-5 may-bea simple;normal1y straight, elongate. element .that is horizontally disposed and which Vextends lengthwise. of Ythe machine as shown in Figs. 1,-2 andiS-of. the-drawings. 'In the case". illustrated the .rail Ais shown las rectangular in cross sectional coniguration,` -in :which case -ithas a at'top 30, a-fiat bottom "3 l and flat vertically disposed sides '32'. The rail is` of such length as to supportthecarriage 26 so that. the saw can be moved beneath thele'F afdistance equalto or greaterthanithe v.length ofthe saw.

The mounting means'Z'l supports the-raili25 so that it canbe flexed or deformed-from itslnormal straight condition :to have-axslight curvature corwhich may occur -inthe toothed` edge of a saw which is being sharpened. In'the. form oftheinvention illustratedf the means -2'! includes Lstructure supporting vor guiding the rail at .both ends and engaged under ythe "rail intermediate its endsorat a centrallpoint.- In the. structure shown in thefdrawings a depending boss135 is provided fonthe bottom 3| of-the vrail midway'between the/ends ofthe-rail andftthe'boss 35 is supported from a xed abutment 36 provided inthe frame A. In the particularconstruction illustrated la collarf3lfis interposed between vthe boss 35.and abutment 36, inwhichfcase-a pin 3'1a extendsbetween the bossan'd the abutment and through thecollar-sorthat it acts-as a pivotal support for the collar.

. 'The'structure just-describedlsupports thelmiddle or center of the rail immediately `beneath'or nthe vertical Aplane or the saw S. llhefportions or means'Z'I that occur at-the-ends :offtheral arealike at each 4endl ofthe rail.- =In'the partictilar case illustrated -a lateralextension-llli) isfprovidedonfthesrail-at eachend thereofrand 'such extension depends from-the -rail to bereceived in and-guided: vertically by guides 4 Iiprovicled on and projectingfrom theend of the bar` I vIL "Through the'construction .justdescribed thefrail 2 5" isA` supported at its centerandits ends-are :guidedfor vertical Vmovement,the guidesrd I Yatthe two -ends of the rail servingtormaintain therailjinproper alignment lengthwise ofthe. machine.

Themeans 28- provideclfforfexing'the Arail 25 acts to depress or lower. en'd portions. of 1 the rail :and git. is :preferably .lan ladjustable or variable means that `can be actuated fto varying degrees Aand'which kcanbefset inany :desired actuated position. The means i128 may, `inl practice," vary Widely informand construction.V However, in the-drawings it is shown-as involving va-pivoted cross varm 45 -With anoperating lever #46.- 'projecting therefrom and lrods 41 i-which 'connect the arms with thelower ends ofrtherail'parts 40. The setting means is provided for clamping or 4setting the partsjust named infany desired vposition and it is shown `in the involving a rod 49 pivoted atthe frame AA and engagedthrough thelever 46 -to be lclamped'to the lever :46 by a screwclamp 50. The structure :the crosszaarm is rotated, causing fthe: two rods .147.: to .fbe operated in.opposite-directions. "The rodscanbefoperated sothat'they are moved inward-or. pullecltogether, in .which eventvthe'structure operatesto. depress orulower theendsrof .the rail-.,2.5. Through-'the construction-described.the desiredflexure of Athe rail can vbe .gainedandwhenpthe rail is in :the desired position the `mechanism canxbe .set .by the elementf5ll.`

The carriage 26 ofthe means fCtisanelongate structure or element `that extends p parallel .with the rail .25 andit :has depending endportions 5| whichengage or rideuponfthelrail 25.v Each endportion has.a;face` 52 that'` is fiat. and=which rides upon the rigid-depending `side anges .|53 engaging the sides 32:` of :the rail .While a .pivoted vretainer .5L4 normallylheld in positionby aspringi55 yengages under Itherail. to releasably'maintain the care riage .on the rail;

' Through this construction the.A carriage Vis=sup ported sby vor from f1 its vfend .portions and isamov.- able lengthwise of the rail -and f by greleasing the retainers 54 Iitwcanzbe-detached :'from. the rail and turned .end A:for fend as circumstances may require.

Saw grips :,565project upwardly from the carriage .26v ati'the yendsthereof to vsupport a saw S in avertical plane-withits upper toothed-edge substantially horizontal, as shownin Fig. 1 vof .the drawings. :'Eachgripiisshown as including opposed j:aws-.,5.l' rcarried on upwardly projecting arms .15.8. sthatcan be sprung ortflexed somewhat to allow f ,the :jaws itoblbe moved into v gripping engagementrwith .thersaw. A screw. clamp means 591 f .extends 'between the :rjaw supporting. v arms Eiland can .be loperated so fthat Ithe Jaws ,151' are engagedrwith the saw in ithe desiredeinatmen.A

The ,operating .means ID kfor the :carriage .'26 of thegmeansfCxisamanual'ly operated means and inthe form fof the:inventionitinvolves. generally, a :hand .wheelv' sei-.carried on a horizontal forwardly ,'.p'rojeeting .shaft i6 iv -so that` `it can be turnednor-rotated. Afrdrum62 is iixed 'to.:and rotates ".with Ltheshat and an coperating .line -63 is carried ..or Wound (on .and tis-operated by "the .cl-rum. Thezline :extendsiin opposite directions from: thelowermost .i portion orf side. of the drum .Thel line whas a -l-portion thatextendsv between 'the-fguide Arollers :ed which portion of the line isf'straight and parallel .with the rail 25'. .In the arrangement :illustrated the :said portion l of :the line 63 :betweenthey rollers iillfis located somewhat forwardf of f the'frail 25. .A '.suiteJole releaslable coupling meansl is.v provided `to i connect the portionvof. fthe-line :fifiv extend-ing between the -rolleriflland the-carriage'26- In the case illustrated this couplingv means finvolves 1adownwardlyfaced or opening-yoke 'l) :on one side of the carriagezrand a `block 'll .xed `on said-:portion of the. linegtheblockbeingin the nature of a spooluso f thatit i has ,a center portion I that is received inzthe .yokewhilerendf'ilanges engage the :sides .offthe-yoke. 1Through this constructionfa releasable vtween-the carriage .and Lthe line. In the preferred construction yokes 'lil are provided yat each v.side/of Athecarriage 226' so that a l`yoke `is available tof-engage:the block ll ywhen thecafrlr-lage isv reversed or: inA eitherl position onthe frail.

f'topi of the rail`- anduitfhas of the plane of the saw and at the desired angle relative to the saw or to the teeth of the saw. In accordance with the invention the means I involves, generally, a neck 80 which is carried by or from the frame A and projects rearwardly therefrom, a guide 8| connected to or coupled with the neck to operate or shift relative thereto about a horizontal axis and also about a vertical axis, and a tool holder 83 carried by the guide 8|. The neck is joined to or is a part of the collar 31 hereinabove described and in the particular case illustrated it projects rearwardly and upwardly from the point where the collar is engaged beneath the rail and on the abutment 36. The collar being pivotally carried by the pin 31a, the neck, which is in effect a part or extension on the collar, can be swung or pivoted about the axis of the pin 31a. Various elements of the construction are carried on the outer or upper end portion of the neck 80 and may in effect be considered a part thereof, and the guide 8| is suitably coupled to the structure on the upper or outer end of the neck. In the case illustrated the guide 8| is connected or coupled to a part fixed on or carried by the end of the neck through a link 90 pivoted to such part of the neck by a horizontal pivot pin 8|. The guide is pivoted to the link 90 by means of a vertical pivot pin 92.

The guide 8| is preferably a straight elongate element or bar that extends substantially horizontal and forward from the point where it is carried by the link and it extends across the saw or above the saw so that its forward end terminates at the front of the machine where it is provided with a suitable operating handle in the form of a grip 95. In the particular case illustrated the guide 8| is in the form of a bar square in cross section and it is so positioned as to have one upwardly facing edge 90 while another edge S'l faces downwardly, the other two edges 98 being side edges that face horizontally.

The tool holder 83 is mounted on the guide 8| to move lengthwise thereon or to reciprocate thereon and in the form of the invention illustrated it involves a body |00 which embraces the rod that forms the guide 8|. In the particular structure shown in the drawings the body is an upwardly faced U-shaped element which embraces the guide 8| where it has flattened sides |0| that are parallel and vertically disposed, and an adjustable section |02 enters the upper portion of the body to embrace the upper portion of the guide and is clamped in the desired adjusted position by a screw clamp |03. The body |00 just described has depending end portions IIO between which the iile or tool F is supported so that the file is parallel with the guide and with the body |00 and is in position to engage the teeth of the saw S.

In the particular case illustrated the file F is supported between the depending end parts H0 of the body |00 by a socket member H2 carried by one end part H0 and an adjustable holder HI carried by the other endl part H0. The socket member H2 has a stem I3 engaged in an opening in its supporting end part i0 and it has a horizontally faced socket opening H4 that will receive the end of a file or the like. The adjustable holder I|| best shown in Figs. 12, 13 and 14 of the drawings is an elongate member rotatably supported in an opening HS in the other end portion H0 of the body. The holder HI has a longitudinal channel or slot H1 formed in it from the end which faces the socket H4, the

channel being such as to receive the tapered end H8 of the le F. A stop H9 is threaded in the member III to engage the end H8 and can be adjusted to hold the le tight in the socket H4. A lock nut |20 is provided for setting the stop in the desired position. The end portion H8 may be set or retained in the channel or groove H'| in member IH as by a clamp collar |20a surrounding the projecting portion of member III and by carrying a clamp screw I2| that can be tightened against one of the flat sides of the end portion H8 of the file. The member III is rotatable in the opening HB so the le can be arranged in any desired rotative position. To set the member in the desired rotative position a segmental projection |30 is provided on the member III and projects therefrom adjacent the end portion of the body which supports member IH. A screw clamp I3| is carried by said end portion of the body |00 and operates in a segmental opening |32 as shown in Fig. l5. Through the construction just described it will be apparent that the le can be rotated through a suitable range and can be set in any desired position within that range.

The means G acts to normally yieldingly hold the guide 8| in an up position where the file F is out of engagement with the saw. In the form of the invention illustrated the means G involves a spring |40 that acts between a fixed abutment and engages under the guide 8|. It will be apparent that the spring |40 needs only to lift the guide 8| a limited amount from the operating position in order to lift the iile from the teeth of the saw and with the arrangement shown in the drawings the spring |4| is near the axis of the pivot 9| so that a person gripping the handle 95 has a substantial mechanical advantage and can very easily depress the guide 8| to bring the le into the desired position in engagement with the teeth of the saw.

The means H normally yieldingly holds the guide 8| in a position about the axis of member 92 so that it extends across the saw and intersects the vertical axis of the pin 3la which carries the neck 80. The means H is such as to allow for limited movement or deflection of the guide 8| in either direction from the said position intersecting the axis of pin 31a. In the particular case illustrated the means I-I involves leaf springs |50 on the sides of the guide 8|, which springs engage or react against upwardly projecting lugs |5| between which the guide 8| is engaged and which are spaced from the sides of the guide far enough to allow the guide to have the desired movement against the resistance of the springs, this structure being shown in Fig. 9 of the drawings. In practice the spring |40 and the lugs |5I above described may be supported by or carried on suitable parts at the outer or upper end of the neck structure 80.

The stop means J is provided to set the neck in various rotative positions about the axis of the pin 318. In the particular case illustrated a segmental rest |50 is supported from the frame A by arms I|| so that it is concentric with the axis of pin 3'1EL and is engaged under the neck at a point removed a substantial distance from the pin. The stop means J is shown as including a stop pin |63 slidably carried by the neck 80 to cooperatively engage one or more sockets |00 provided in the segmental rest |60. The stop pin |63 is shown normally yieldingly held in socket engaging position by a spring |65 and a manually operable pivoted lever |06 engages the stop pin and can f be manually I operated in the :direction indicated by the arrow inrFig. -85 so that the stop pin is withdrawn from the segmentlll fIt -will be 'apparent that by providing sockets /|'64 fat suitable vintervals lengthwise of theneckusupportinglsegment'li, and in both directions from a'normal position, the neck can be adjustedlfas desired. Anormal position of lthe neck-maybe consideredfa position in which-the neck extends sothat it supports the-guide 8| yinfa direction normal to the plane of the saw.' It isfrto'be observed that the segmental rest is provided fwith suitable graduations or markings |80 forming scales by which the position of the :neck can be readily determined.

The operating means K providedffor operating the clamp memberf22 of means Bis preferably a cam-means and as shown in the drawings it involves a -rotating cam 18| and acam follower |82 engagingzthe cam andsupported vby apivot pin-|83. The pivoted cam follower isV in thenature of a bell crank one arm of Which carries a rollerthat engages the cam while -the other arm carries an operating `line 84 which-extends lto and which operates the clamp member 22. In :the particular-arrangement illustrated the line .|84 operates over a guide roller` |85 and is connected to the clamp member 2-2 by a suitable kcou- .pling mechanism |98. The vparticularcoupling mechanism illustrated in the drawings involves a'cam part |9| xed on the .clampmember22 and a cam part |92rotatable yrelativeV to part 19|.'andhavingthe-line |84 anchored to it. y lThe cam parts |9| and |92 are so shapedand related that by rotation of the-campartrlSl theeffec- -tive length of rthe line |84 can bevaried. In

practice it is Apreferred* that the `parts -be nor- .mally set so that the line |84 is normally of minimum length and whenever it is'desired to release the clamp member 22 and regardless of .the position of cam |8| this actioncan be gained by rotation of the cam part |92 to a position .Where the effective length of the line |84 is-in/ creased. n

The operatingmeans L provided for operating vthe tool'holder acts to reciprocate the tool holder V83 on or along the guide 8|. Inthe case illus- .trated the means L involves a rotatingfcrank 200, a rocker 20| pivotally supported at 202,. a linkl203 pivotally connecting the crank 2|l0fand .the rocker 20| and a link 204 connecting vthe rocker 20| and the bodyeof the holder -83. r-In xthe preferred form of the invention the `link-203 -is pivotally connected to the outer end ofthe crank arm 200 and it can be connected to various points along the rocker 20| so that lthefaction of this-means can be adjusted or varied as desired. The link `204 isvpreferably connected `to the outer end of the rocker 20| and to the-body of the tool holder 83 by universal connections. In .the drawings andvparticularly in Fig. 11-we show-ball and socket type of connections which allow for the desired flexibility or universallmovey.ment .between the oscillating end of `the rocker 420| andthe body of the tool-holder.

The drivemeans M provided `by the present linvention is -a power meanscausing `the cam .|8| of means K to operate in synchronism with the crank arm 200'of thefmeans L. -In thepartic- 'ularcase illustrated in the drawings the'means YM includes a prime -mover in the form `ofkzan yelectric motor -2|0 carried on'vthe outer-'endfpor- -tion of neck 80 by a bracket `2|| iso the motor 'depends from the neck. A single'shaft 2|2 foarthese elements-'beingiixed v.to lthe shaft. A suitable-drive -is provided from lthe motor-2|0to the.=shaft-2|2. In-the particular caseillustrated this drive involves abelt=2|5voperatedby adrive pulley 2-|| on the.- motor shaft and running over a driven pulley 2|? on the shaft-2|8v of .gzgear mechanism-ZIB. The shaftr2|2fisa shaft-of or is operated by thegearfmechanism. The structure just described is suchthat the. desired speed reductionv is" obtained between the motor 2 |0- and theshaft 2 2. y

'With the: mechanism abover described it will be apparent that the cam 18|, being-on the same shaft :as the crank arm y200, is synchronized with the f. crank-arm, with lthe fresult that Itheel-amp member 2 of means B is operated in synchronism with. the .tool carrier A'33. Theparts are so'related-.that-the-clamp member 2| *is` set to clamp the i saw l against vmovement immediately before thetool carrier moves inra direction to'fcause the file tocut; and the saw remains held or cl-amped .until the cutting action of theiile hasbeen completedyat which time the clamp lmember l2| -is `releasedso that'the-saw is free-to beadjusted-'or positioned byoperation of the means D.

From the foregoing description it `will'be `ap parent that the structure provided by the present invention enables an operator to easily-andquickly set ithe machine with they toolV orifle F at the de- 4isiredangle relative to the'teeth of the saw and when f the machinev is put=in operation,V as f by clos- .ingr'of a suitably located :control `switch 300 lthe rclampsfofrmeans-B and the tool'holder ofmeans -Eszoperate .inv synchronism'as *above described, leaving the guide 8| to be operated or l'depressed manuallyiinf-the' desired r manner; and the .means 1D Sto bel'operated ias vdesired Ito advance the." saw 4beneath'the'.le.v In practice the'teeth'oflmost saws; L.vary enough :so that ."'a .fully automatic `de- -vice does fnotalways wor satisfactorily. However,1the :device of thepresentrinvention, having vthe :manual ."controls LaboveV described, :enablesf an operator to apply'the ydesired pressure to' the-file -and-'toaadvance theI saw 'beneath the rfile as desired "and as circumstances may l'require, to the end v"that a highly 'satisfactory result is readily obtainable.

Having-described' only a typical .preferred form andfapplication ofour invention, weudo n`ot wish lto-rbelimited or restricted tothe specific details herein set-forth, but wish `to *reserve to: ourselves Ianywvariations'or modications that may appear to those skilled in the art and fall within: the scope ofthe following claims.

r Having :describedour invention, we claim:

l. :A- A:saw sharpening machine including, va iframe, a' lsaw 'clamp rincluding cooperating jaws fand afclamp-me'mbercarrying one of 'the jawslat -itsupper end; a sawv support including` a shiftable l:carriagey adapted :to carry 'the lsawin position to fberengag'edby the clamp,"operating means adapted to'shift thevcarriage :relative to the clamp,V -a sharpeningtOOI, a ltoolI mountingincluding afneck, a guidercarried bythe neck andextending'translverselyiof the direction i of lmovement of thefcar- Inriage, y'anda y-tool holder Icarrying the tool and slidably4 carried by the guide 'to move :lengthwise of .the guide;v operating meansad'apted to actuate the. holder, Ameans pivotally connecting the Fneck .and iguide for Imovement ofthe `guide about -a Vvertical axis, Vand-power means adaptedA nto .rsyn- .'chronously 'drive they operating means, lthefframe including, a base, ast'andard projectingsupw'ardly :fromf thebase.. horizontally idispo'se'd arms V`supported fromathe standard, v.legs depending vfrom the arms and pivotally carrying the clamp member, and converging posts projecting upwardly from the arms and having their upper ends joined and supporting the other jaw, the neck being supported by the frame for pivotal movement about a vertical aXis.

2. A saw sharpening machine including, a frame, a saw clamp including cooperating jaws and an upwardly extending clamp member carrying one of the jaws at its upper end, a saw support including a shiftable carriage adapted to carry the saw in position to be engaged by the clamp and being adapted to shift the saw relative to the clamp, operating means adapted to shift the carriage relative to the clamp, a sharpening tool, a tool mounting including a neck, means pivotally supporting the neck, a guide pivotally carried by the neck and extending substantially transverse of the direction of movement of the carriage, and a tool holder carrying the tool and slidably carried by the guide to move lengthwise thereof, operating means adapted to actuate the holder, and power means adapted to synchronously drive the operating means, the frame including, a base, a standard projecting upwardly from the base, transverse arms supported from the standard, legs depending from the arms and pivotally carrying the clamp member, and converging posts projecting upwardly from the arms and having their upper ends joined and supporting the other jaw, the neck projecting rearward from the standard and the guide projecting forward from the rear portion of the neck and over the saw in the carriage and engaged by the jaws.

3. A saw sharpening machine including, a support, means adapted to clamp a saw including cooperating jaws, saw supporting means including a shiitable carriage adapted to carry the saw and to move relative to the jaws, operating means adapted to shift the carriage, a sharpening tool, a tool mounting including, an elongate guide extending transverse of a saw carried by the carriage, means connecting one end of the guide to the support for movement about a vertical axis and about a horizontal axis, and a tool holder carrying the tool and slidably carried by the guide to move lengthwise thereof, a handle on the other end of the guide, operating means adapted to actuate the clamping means, operating means adapted to actuate the holder, and power means adapted to synchronously drive the operating means.

4. A saw sharpening machine including, a support, means for clamping the saw including cooperating elongate jaws adapted to engage the saw and a clamp member carrying one of the jaws, the jaws having opposed heads adapted to engage opposite sides of the saw and being pivotconnected together at a point spaced from the heads and being spaced apart between the heads and said point, supporting means for the saw including a shiftable carriage extending between the jaws and adapted to carry the saw and to move relative to the jaws, manually operable means adapted to shift the carriage, a member pivoted to the support, an elongate guide having one end pivoted to said member and projecting over the carriage in a direction substantially transverse of the direction of movement of the carriage, a sharpening tool, and a tool holder carrying the tool and slidably carried by the guide to move lengthwise thereof, a handie on the other end of the guide, operating means adapted to operate the clamping means, operating means adapted tc operate the holder, and power means adapted to synchronously drive the operating means.

5. In a saw sharpening machine, a vertical standard with a lateral projection thereon, a support pivoted to the projection and extending rearwardly therefrom, a saw clamp carried by the standard and including elongate jaws with opposed heads adapted to engage the saw, the jaws being pivot-ed together at a point spaced below the heads and being spaced apart between the heads and said point, a saw support including a shiftable carriage extending between the jaws and adapted to carry the saw and a track carried by the standard and slidably supporting the carriage for movement relative to the clamp, operating means adapted to shift the carriage along the track, a sharpening tool, a tool mounting including a tool holder carrying the tool and a guide pivot-ed to the support and slidably supporting the holder and extending across the track above the carriage and above the jaws, operating means adapted to operate the clamp, and operating means adapted to operate the holder.

6. A saw sharpening machine including, a frame, saw clamp means carried by the frame and including cooperating jaws and a clamp member extending upwardly and carrying one of the jaws at its upper end, a saw support including a shiftable carriage adapted to carry the saw and a rail slidably carrying the carriage and supported by the frame, operating means adapted to shift the carriage along the track, a sharpening tool, a tool mounting including a tool holder carrying the tool and adapted to reciprocate in a direction transverse of the track, operating means for the holder, and power means adapted to synchronously drive the operating means, the frame including, a base, a standard projecting upwardly from the base, transverse arms supported from the standard, legs depending from the arms and pivotally carrying the clamp member, and converging posts projecting upwardly from the arms and having their upper ends joined and supporting the other jaw.

7. In a saw sharpening machine, a frame, a saw clamp carried by the frame, a manually shiftable carriage for the saw and carried by the frame, a sharpening tool, a tool mountingv including a pivoted guide and tool holder carrying the tool and slidable on the guide to operate transverse of the carriage, a spring normally yieldingly holding the guide with the tool clear of a saw carried by the carriage, the guide being manually operable to move the tool carried by the holder into engagement with the saw carried by the carriage, operating means adapted to actuate the clamp, operating means adapted to actuate the holder, and power means adapted to synchronously drive the operating means.

8. In a saw sharpening machine, a frame, a

saw clamp, a support adapted to carry a saw and including, a resilient rail extending between the frame and the clamp, a carriage operable along the rail, and saw grips projecting upward from the carriage and carrying the saw, operating means adapted to shift the carriage along the rail, a sharpening tool, a tool mounting including a tool holder carrying the tool and adapted to reciprocate transversely of the saw carried by the carriage, operating means adapted to operate the clamp, operating means adapted to actuate the holder, power means adapted to synchronously drive the operating means, the rail being normally straight and being flexible into egeeagem curvedf form;v and; means engagingttheirailtat.fthe end portions thereof. and adapted tciex-theirail .ifrom ythe positionwhere it isstraight.

;1'9'.' A. 'sawsharpening .machine iincluding, a lframe, asaw.- clamp, a sawfsupport including, a normally Astraight .exible rail extending :be- :tween the framefand clamp,`means operableito eexgthezrail, acarriage operable along therail, :and v'saw grips projecting upward from .the carriage :and f adapted ito .carry the saw, :operating lmeans r adapted z to shift the lcarriage .along :the mail, .a sharpening tool.. a .tool mountingcarried .by the :'.framevand Lincluding a :tool holder .carry- .inginthe ztool. and mounted to ireciprocate trans- .lverselyfofzthe -saw carriedbyzthe carriage,t oper- -iatingmeans adapted to actuate the clamp,.oper atingimeans adapted to actuate the holder-,rand t power means adapted to. synchronously drive'the .operating means.

'-LlO. A .saw sharpening .machine including, va frame, a saw clamp, a sawiasupportzincluding, a `normally straight flexible rail extending between -theframe andclamp, means operable to flex the -rail,a vcarriage operable along the rail, and saw I'grips Aprojecting upward from the carriage and -carrying `the saw, operating means adapted vto shift,v the carriage, a sharpening tool, a tool fmountingincluding a tool holder carrying the ,tool and mounted to reciprocate, operating means yadapted toyactuatethe clamp, operating :means adapted to `actuate the holder, and power :means adapted to synchronously drive the operratingmeans, the means for ilexing the rail in- ;cluding .a pivoted cross arm, and oppositely oper- :.ating'tiesconnectin'g the cross arm and the ends ofthe rail.

'"11. A sawsharpening machine including, a ;frame, a saw clamp, a saw support including, a 4normally straight flexible rail extending between the'frame and clamp, means operable to ex the rail, a carriage operable along the rail, and saw grips-projecting upward from the carriage and ,adapted to carry the saw, operating means adapted to shift the carriage along the rail, a 'sharpening tool, a tool mounting including a tool holder carrying the tool and mounted to recipro- -cate transversely of the saw supported by the `carriage, operating means adapted to actuate the aclamp, operating means adapted to actuate the holder, and power means adapted to synchro- .fnously drive the operating means, the means for exing 4the .rail .including a pivoted cross arm, :releasable means adapted to set the cross arm :infan actuated position, and oppositely operating yities connecting the cross arm and the ends of the.rail.

12. A saw sharpening machine including, a \'frame,asaw clamp, a saw supporting means in- :cluding -anormally straight ilexible rail extending between the frame and clamp means, means #operable to ex the rail, a carriage shiftable :along the rail, and saw grips projecting upward from' the carriage and adapted to carry the saw, operating means adapted to shift the carriage ialongthe rail, a sharpening tool, a tool mount- 'ingincluding a tool holder carrying the tool and :mounted 'to reciprocate transversely of the saw supported by the carriage, operating means 'adapted toactuate the clamp, operating means :adapted to actuate the holder, and power means adapted to synchronously drive the operating meansgthe means for flexing the rail including a `:pivotedicross arm, and oppositely operating ties connecting the cross arm and the ends of the .frail,..the rail-fleeing supportedl from below y fat av 1.75 rail, a shiftablecarriage adapted to :middlejpointrand'zthetiesbeingmperablertor-lower therends'of'thetrail.

13. A saw :sharpeningmachinesincluding; :a frame, aggsaw clam a saw-fsupport including, a fnormally straight flexible rail u extendingibetween ;th'e. frameand clamp, meansroperablel to tiiexzthe rail, a carriage; .operable along the zrail, 'andzsaw grips projecting 4upward .fromfithe .carriage and ladapted .lto carry .the saw,n operating means .adaptedxto -shiftthei carriage along the .rail,:a `sharpening'tcol, a'tool'mounting includingfa tool holder carrying the tool and .mountedato :reciprocate transversely 4of'fthe-:saw :carried by the carriage, operating means 'adapted' to actuate .the f clamp, operating means adapted to actuate" the holder, and `power means-adapted to-synchronously-pdrivev they operating means, means. mount- .ing therail including affixed supportunder. the -rail midway between -its :endsiand-guides-.supporting the end gportions of:` :their` rail for vertical movement, ltheameans forfflexing the rail `including :a pivoted cross `rarm, 'and oppositely operatfing .tiesc connecting .thecross arm aand the ends fofvthezrail.

,'14. A saw-sharpening machine-including, .a frame, a saw clampsupportedfromftheframe, a saw ,support on..the-frame -includinga-ra'il, a pshiftable carriage. carrying :the saw and operable along the irail, ,V operating means adapted :'to. )shift ythe carriage including, a .line fextending .sub stantially -parallel with the railn and agmanually operated drum'adapted to foperate .the line, a lsharpening tool,- a'tool mounting including atool vholder carryingthetool andmounted torecipro- .cate in a direction transverse of'therail, voperat- -ingV means adapted vto Vactuate :the lclamp, operl ating means'adapted izo-actuate the holder, and i, power; means;v adapted to, synchronously driveft-he i operating` means.

l5. vA saw 'f sharpening machine including,v :a frame, a saw clamp supported from'thevframe, asawsupportpn the frame fincluding arail, a f shiftable carriage.-fadapted to-.carry fthe saw and -operable along therail, means adapted toshift the vcarriage fincluding, `.a l:line extending sub- .'stantially-parallel with .the rail,fmeans coupling .theline and carriage, and -a manually operated I drumadapted to operate' the I line, a `sharpening tool, a tool mounting including a tool-...holder carrying the tool and vmounted tovreciprocate in a direction transverse of the rail, voperating `meansfadapted to actuate the clamp, operating means adapted to actuate "theholder, -and power v'means adapted to synchronously drive theoperating means.

.16. A saw sharpeningmachine including, a frame, a -saw clamp supportedfrom therframe, a saw supporton theframe including awraiL-.a shiftable carriage carrying the saw-.andoperable along'the -rail,.m'eans adapted fto shift the icarriage including, afline extending substantially Aparallel with the rail and va-'manually-operated drum carrying theline, the drum having ahan'cl wheel and thefline being directed by guide rollers, a sharpening tool, a tool mounting includingra toolzholdervcarr-ying ,the tool and mounted to--reciprocate in a direction transverse of the rail, loperating means adapted to actuate the clamp, .operating means adapted to actuate-the holder, and power means adapted tosynchrcnouslydrive Vthe operating means.

17. A saw sharpening machine including, a frame, a sawclamp supported from the frame, asaW-support carried by the frame including-a carry the-Saw and operable along the rail, means adaptedv to shift the carriage including, a line extending substantially parallel with the rail, means coupling the line and carriage including yokes on the carriage selectively engageable with a spool-like block on the line, and a manually operated drum carrying the line, a sharpening tool, a tool mounting including a tool holder carrying the tool and mounted to reciprocate in a direction transverse of the rail, operating means adapted to actuate the clamp, operating means adapted to actuate the holder, and power means adapted to synchronously drive the operating means.

18. In a saw sharpening machine, a frame, a saw clamp supported from the frame, a support on the frame carrying a saw for movement lengthwise thereof, a neck pivoted to the frame on a vertical axis in the plane of a saw in the support, a guide carried by the neck and extending over the saw transversely thereof, a sharpening tool and a tool holder carrying the tool and slidable along the guide, means adapted to shift the support, operating means adapted to actuate the clamp, operating means adapted to actuate the holder, and power means adapted to synchonously drive the operating means.

19. A saw sharpening machine including, a frame, a saw clamp carried by the frame, a saw support carried by the frame and including a shiftable saw supporting carriage, a neck pivoted to the frame on a vertical axis in the plane of a saw in the support, a guide pivotally carried by the neck on a horizontal axis and extending over the saw transversely thereof, a sharpening tool, and a tool holder carrying the tool and slidable along the guide, operating means adapted to shift the carriage, operating means adapted to actuate the clamp, operating means adapted to actuate the holder, and power means adapted to synchronously drive the clamp and holder operating means.

20. A machine adapted to handle a saw and sharpening tool including, a frame, a saw clamp carried by the frame, a saw support carried by the frame and including a shftable carriage, a neck pivoted to the frame on a vertical axis in the plane of a saw in the support, a guide pivotally carried by the neck on a horizontal axis and on a vertical axis and extending over the saw transversely thereof, means normally yieldingly holding the guide against movement about its vertical axis, and a tool holder slidable along the guide and adapted to carry the tool to engage the saw, manual operating means adapted to shift the carriage, operating means adapted to actuate the clamp, operating means adapted to actuate the holder, and power means adapted tosynchronously drive the clamp and holder operating means.

21. A saw sharpening machine including, a frame, a saw clamp supported from the frame, a saw support carried by the frame and including a shiftable saw supporting carriage, a neck pivoted to the frame on a vertical axis in the plane of a saw supported by the carriage, a guide pivotally carried by the neck on a horizontal axis and extending over the saw transversely thereof, means releasably holding the neck against movement about its pivotal axis, means normally yieldingly holding the guide against movement about its vertical axis, a sharpening tool, and a tool holder carrying the tool and slide-ble along the guide, operating means adapted to shift the carriage, operating means adapted to actuate the clamp, operating means adapted to actuate the r16 holder, and power means adapted to synchronously drive the operating means.

22. A machine adapted to handle a saw and a sharpening tool including, a frame, a saw clamp supported from the frame, a saw support including a shiftable saw supporting carriage, a neck pivoted to the frame on a vertical axis in the plane of a saw supported by the carriage, a guide pivot-.ally carried by the neck on a horizontal axis and on a vertical axis and extending over the saw transversely thereof, means normally yieldingly holding the guide against movement about its vertical axis, means releasably holding the neck against movement about its pivotal axis, and a tool holder slidable along the guide and adapted to carry the tool for engagement with the saw, operating means adapted to shift the carriage, operating means adapted to actuate the clamp, operating means adapted to actuate the holder, and power means adapted to synchronously drive the operating means.

23. Tin a saw sharpening machine, a frame, a saw clamp supported from the frame, a saw support carried by the frame and including a shiftable saw supporting carriage, a neck pivoted to the frame on a vertical axis in the plane of a saw in the support, a guide pivotally carried by the neck on a horizontal axis and on a vertical axis and extending over the saw transversely thereof, a tool holder slidable along the guide and adapted to carry a tool, means normally yieldingly holding the guide against movement about its vertical axis, and means normally yieldingly holding the guide in position where a tool in the holder is clear of the saw, means releasably holding the neck against movement about its pivotal axis, means adapted to shift the carriage, operating means adapted to actuate the clamp, operating means adapted to actuate the holder, and power means adapted to synchronously drive the operating means.

24. A saw sharpening machine including, a frame, a saw clamp supported from the frame, a saw support carried by the frame and including a shitable carriage, a neck pivoted to the frame on a vertical axis in the plane of a saw in the support, a guide carried by the neck and extending over the saw transversely thereof, means releasably holding the neck against movement about its pivotal axis including an apertured segmental rest vcarried by the frame and engaged under the neck and a manually operable spring pressed pin carried by the neck and engageable in apertures in the rest, a sharpening tool, and a tool holder carrying the tool and slidable on the guide, means adapted to shift the carriage, operating means adapted to actuate the clamp, operating means adapted to actuate the holder, and power means adapted to synchronously drive the operating means.

25. In a saw sharpening machine, a frame, a saw clamp, a saw support including a shiftable carriage adapted to carry the saw in a vertical plane, means adapted to shift the carriage, a sharpening tool, a tool mounting including a tool holder carrying the tool and mounted to reciprocate, operating means adapted to actuate the clamp including, a rotatable cam laterally spaced from the support and carriage, a follower cooperating with the cam and a flexible line extending from the follower to the clamp, operating means adapted to actuate the holder, and power means adapted to synchronously drive the operating means.

26. In a saw sharpening machine, a frame, a

saw clamp supported from the frame, a saw support carried by the frame and including a shiftable carriage carrying the saw, means adapted to shift the carriage, a tool mounting including a tool holder mounted to reciprocate transversely of the saw carried by the carriage, operating means adapted to actuate the clamp including, a rotatable cam, a follower cooperating with the cam, a iiexible line operable by the follower, and a manually operated means coupling the line and the clamping means operable to vary the effective length of the line, operating means adapted to actuate the holder, and power means adapted to synchronously drive the operating means.

27. A saw sharpening machine including, a frame, a saw clamp supported from the frame, a saw support carried by the frame and including a shiftable carriage adapted to carry the saw, operating means adapted to shift the carriage, a sharpening tool, a tool mounting including a tool holder carrying the tool and mounted to reciprocate transversely of the saw supported by the carriage, operating means adapted to actuate the clamp including, a rotating cam, a follower cooperating with the cam, a flexible line operable by the follower, and a manually operated means coupling the line and the clamping means operable to vary the effective length of the line, operating means adapted to actuate the holder including, a rotating crank, a pivoted rocker, a connecting rod between the crank and rocker, and a connecting rod between the rocker and the holder, and power means adapted to synchronously drive the operating means.

28. A saw sharpening machine including, a frame, a saw clamp, a saw support including a shiftable carriage carrying the saw, operating means adapted to shift the carriage, a sharpening tool, a tool mounting including a tool holder carrying the tool and mounted lto reciprocate, operating means adapted to actuate the clamp including, a rotating cam, a follower cooperating with the cam, a exible line operable by the follower, and a manually operated means coupling the line and the clamp operable to vary the effective length of the line, operating means adapted to actuate the holder including, a rotating crank, a pivotecl rocker, a connecting rod between the crank and rocker, and a connecting rod between the rocker and the holder, and power means adapted to synchronously drive the operating means and including a single shaft carrying the crank and the cam.

References Cited in the le of this patent UNITED STATES PATENTS Number Name Date 94,890 Huston Sept. 14, 1869 122,929 Wilsey Jan. 23, 1872 255,007 Myers Mar. 14, 1882 308,670 Hill Dec. 2, 1884 527,382 Howard Oct. 9, 1894 847,804 McAulay Mar. 19, 1907 889,180 Daniels May 26, 1908 997,817 Hobson July 11, 1911 1,159,442 Wasser Nov. 9, 1915 1,269,705 Hall June 18, 1918 1,849,685 McMillan Aug. 17, 1920 1,455,917 Laury May 22, 1923l '1,468,988 Wilthil Sept. 25, 1923 1,652,454 Myers Dec. 13, 1927 1,728,893 Collier Sept. 17, 1929 1,846,331 Hickey Feb. 23, 1932 1,923,446 Loibl Aug. 22, 1933 2,267,553 Dale Dec. 23, 1941 2,843,171 Collier Feb. 29, 1944 2,429,300 Wilbert Oct. 21, 1947 2,441,788 Zapart May 18, 1948 2,519,735 Boutin Aug. 22, 1950 2,519,748 Duquette Aug. 22, 1950 2,555,569 Bornholdt June 5, 1951 

